(function (w) {
    var  test = "test";
    w.laofu = {};

    function a() {
        console.log("laofu-a")
    }

    function b() {
        console.log("laofu-b")
    }

    function c() {
        console.log("laofu-c")
    }

    w.laofu.a =a;
    w.laofu.b =b;
    w.laofu.c =c;

})(window)